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G. F. NIEMANN SWITCH SOCKET Filed JulyA 3o.. 1924 MyW Patented July 10,1928i.

UNITED STATES PATENT OFFICE.

GEORGE F. NIEMANN, OF CHICAGQILLNOIS, ASSIGNOR TO BENJAMIN ELECTRIC MAN-UFACTURING COMPANY, F CHICAGO, ILLNOIS, A CORPORATION OF ILLINOIS.

SWITCH SOCKET.

Application led July 30,

My invention relates to switch sockets and more particularly to a switchsocket of the push bar type in which a sub-assembly is held in thecasing by the push bar.

One of the objects of my invention is to provide means for holding theswitch mechanism in position te receive the` push bar when it is againinserted to hold the` subassembly in place.

`Further objects will appear from the de scription and claims.

In the drawings, in which an embodiment of my invention is shown-`Figure 1 is an axial section of a push bar switch socket;

Fig. 2 is a section on the line of Fie. 1;

l? ig. 3 is a plan View of the subsassembly;

Fig. 4 is a section en the line Ilma et' Fi 2;

fig. 5 is a section similar to Fig. 1 showing the switch in openposition; and

Fig. 6 is a perspective view et a switch assembly. y

Referring to the drawings in detail, the construction shown comprises aunit shell sheet metal casing 10 and a subassembly, shown in F ig. 2,insertable and removable with respect te the casing through the open endthereof and held in place in said casing by the insulating push bar 11which operates the switch mechanism. This sub-assembly comprises aninsulating base 12, shell and center contact members 13 and 1li, wiringterminals 15 and 16, and switch mechanism mounted on this insulatingbase. T he switch controls the circuit between the wiring terminal 15and the center contact member. F orthis purpose, a pair et relativelystationary U-shaped spring contact members 17 and 18 are provided, oneof which is electrically connected with the wiring terminal 15, and theother of which is electrically connected with the center Contact 14s bymeans of the long eyelet member 19. rlhe binding plate of the wiringterminal 15 is helden the insulating base by means et the long eyeletmember 20. The other wiring terminal 16 is electrically connected withthe shell contact by means et the screw 21.`

A passageway is provided in the insulat- 1924. Serial' No. 729,011.

ing base 12 to receive the insulating push bar 11 and oppositelydisposed openings 22 and 23 are provided in the casing for the passageof this insulating push bar so that the sub-assembly is held in place inthis casing by means of this push bar and can be withdrawn upon removalof the push bar through the side oi' the casing.

rllhe construction is such that the switch mechanism stays in properposition to receive the insulating push bar when it is again inserted.This switch mechanism comprises, in addition to the insulating push bar,a switch trame 24, an oscillatable switch arm 25 of conducting materialpivoted on the switch irame 24 by means of 'the pinties 26, a coilcompression spring 27 shittable back and forth past the dead center tocause oscillation of the switch arm, and a4 spring-supporting andcarrying member 28, surrounded by the compression spring and haii'ingone end slidable in an opening 29 in the end et the switch arm and theother received in a notch 30 in the insulating push bar.

In order to hold this switch arm, spring and spring-carrying member inproper position te receive the push bar, when it is again inserted, thespring-carrying member is provided with a uif-shaped head, the laterallyextending` portions et which rest on the switch trame when the push baris withdrawn. The switch arm is limited in its oscillatable movement bymeans of t-he stop lugs 32 on the switch frame.

1t it is desired to withd 1aw the insulating push bar, it is pulled outon the lett side as viewed in Fig. 1, the iirst withdrawal movementcausing the spring-carrying member 28 to be lifted up slightly to permitit te disengage from the notch 30 in the push bar. Further withdrawaloli` the push bar allows the spring-carrying member to settle down entethe supporting sides et the switch frame on which it rests until thepush bar again inserted. Upon again inserting the push bar thespring-carrying member rides up the inclined portion oi" the push baruntil it drops again into the notch.

The circuit is from the wiring` terminal 15 through the Contact li',switch arm 25,

iii

contact 1S, eyelet 19, center Contact 11i, shell contact 13 and screw 21to the wiring terminal 16. lin operation, when the push bar is movedfrom one side to the other the spring` 2i' is compressed and when it'ismoved past its dead center causes a quick snappy oscillation ol theswitch arm to make or break the circuit.

vVhil-e Iliave shown Vbut one embodiment oi my invention. it is obviousthat it may be embodied in other forms covered andy defined by theappended claims.

Having' thus described my invention, what l claim as new and desire tosecure by Lettifnfs Patent oi` the li. S. is

l. switch sochet comprising an insulating" base, receptacle contacts,wiring` terminals and switch mechanism mounted on said base, said basewith the contacts and wiring terminals being' insortalile and removablewith respect to casing* as a sub-assembly, said switch mechanismcomprising (1) a push bar extending transversely through saidsub-assembly and serving to hold said subfassembly in said casing' `andbeing removable laterally from said casing to release said sulrasseniblytor removal from said casing', an oscillatable switch arm, (3*) a?spring.;- shirt-able back and torth to cause said oscillation ot saidswitch arm, and

a spring-carrying member extendingbetween said push bar and switchA arm,and means' wherebv when said push bar is withdrawn vfrom saidsub-assembly, said spring carrying member' will' be held in position tocome into operative relation with said push bar when it is againinserted.

L. A switch socket comprising` an insulating` base, receptacle contacts,wiring terminais and switch mechanism mounted on said base, said basewith the contacts and wiring terminals beine` insertable and removablewith respect to a casing as a sub-assembly, said switcli meelmnismcon'iprising` (1) a push bar extending transversely through saidsub-assembly and serving to hold said sub-assembly in. said casingandbeing removable laterally from said casing to release said sub-'assemblyfor removal from saidl casing, an oscillatable switch arm, (3) aspring'v shiltable bach and forth to cause said oscillation ot saidswitch arm, and (i) a springcarrying` member extending between said pushbar and switch arm, and means whereby when said push bar is withdrawn.trom said sub-assembly, said spring-carrying' member will be held inposition to come into operative relation with said push bar when it isairain inserted, said means com- 'yfirisinn a. rest engaged by saidspring-carrymember upon withdrawal of said push mg bar. y

s *itch socket comprisini)l an insulating; base, receptacle contacts,wiring` terminals and switch mechanism mounted on said from said casing,(2) an oscillatable switch arm, a spring` shittable back and forth tocause said oscillation of said switch arm, (i) a spring-cartying memberextending between said push bar and switch arm, and (5)' a. switchtraine on which said arm is pivoted, provided with a rest engaged bysaid springrcarryino member upon withdrawal ot saidl push bar wherebywhen said push bar is withdrawn from said sub-assemblyY saidspringcarrying; member will be held in position to come into operativerelation with said push bar when it is aga-in' inserted.

AA switch socltet comprising an insulating` base, receptacle contacts,,wiring terminals and switch mechanism mounted on said base, said basewith the contacts and wiring terminals being insertable andreuu *ablewith respect to a casing" asa subassembiy. said switchmechanism compris`inn` (l) a push bar extending transversely through said sub-assemblyand1 serving to hold said sub-assembly 'in' said casing` and beingremovable laterally from said casing to release said sub-a`ssembly forremoval from said casing, (2) an oscillatable switchl arm, (3) a spring'shiftable back and forth to cause said oscillation of said switch arm,(Li) a spring-carrying member' extending between said push bar andswitch arm, and a switch trame on which saidarm is pivoted, providedwith a rest engaged by said' spring-carrying member upon withdrawal ofsaid push bar whereby when said push bar is withdrawn -from saidsub-assembly said' spriiig-carrying member will bev held in po sition tocome into operative relation with said push bar when it isagain'inserted, said push bar being slidable in said switch i'rame.

A switch socket comprising an insulatini;l base, receptacle contacts,wiring terminals and switch mechanism mounted on said base, said basewith the contacts and wiring terminals being i'nsertable and removable'with respect to a casingl as ai sub-assembly, said switch mechanismcomprising a push bar extending transversely through said sub-assemblyand serving to hold said sub-assembly in said casing and being'removable laterally trom said casing to re# lease said sub-assembly forremoval from said casing', (2) an oscillatable switch arm, a springshiftable back and forth to cause' said oscillation ot said switch arm,a spring-carrying member extending bei io tween seid push bar and switcharm, and inserted, said push bar having a notch to 10 (5) a switch frameon which said arm is receive the end of seid spring-Carrying pivoted,provided with e rest engaged by member out of which notch saidspringpzus-id springealryiiig member upon Withrying member rides whenthe push bar is 5 drziwal ot' said push bar whereby when said withdrawn.

push ber is withdrawn from said Sub-assem In Witness whereof, I havehereunto sub- 5 bly said spring-Carrying member will be scribed my name.held in position to come into operative relation With said push bar Whenit is again GEORGE F. NIEMANN.

